build.gradle

import org.ajoberstar.grgit.*

buildscript {
    repositories {
        mavenCentral()
    }
    
    dependencies {
        classpath 'org.ajoberstar:gradle-git:0.11.2' 
    }
}

apply plugin: 'groovy'
apply plugin: 'maven'
apply plugin: 'signing'

repositories {
    mavenCentral()
}

group = 'me.tatarka'
version = '2.4.1'

dependencies {
    compile gradleApi()
    compile localGroovy()
    compile 'com.android.tools.build:gradle:0.8+'
}

task javadocJar(type: Jar, dependsOn: javadoc) {
    classifier = 'javadoc'
    from 'build/docs/javadoc'
}

task sourcesJar(type: Jar) {
    from sourceSets.main.allSource
    classifier = 'sources'
}

artifacts {
    archives jar
    archives javadocJar
    archives sourcesJar
}

if (project.hasProperty('sonatype.username') && project.hasProperty('sonatype.password')) {
    signing {
        sign configurations.archives
    }

    uploadArchives {
        repositories {
            mavenDeployer {
                beforeDeployment { deployment -> signing.signPom(deployment) }

                def repoUrl
                if (project.version.endsWith("SNAPSHOT")) {
                    repoUrl = "https://oss.sonatype.org/content/repositories/snapshots"
                } else {
                    repoUrl = "https://oss.sonatype.org/service/local/staging/deploy/maven2/"
                }

                repository(url: repoUrl) {
                    authentication(
                            userName: project.getProperty('sonatype.username'),
                            password: project.getProperty('sonatype.password'))
                }

                pom.project {
                    name 'gradle-retrolambda'
                    packaging 'jar'
                    description 'A gradle plugin for getting java lambda support in java 6, 7 and android'
                    url 'https://github.com/evant/gradle-retrolambda'

                    scm {
                        url 'git@github.com:evant/gradle-retrolambda.git'
                        connection 'scm:git:git@github.com:evant/gradle-retrolambda.git'
                        developerConnection 'scm:git:git@github.com:evant/gradle-retrolambda.git'
                    }

                    licenses {
                        license {
                            name 'The Apache Software License, Version 2.0'
                            url 'http://www.apache.org/licenses/LICENSE-2.0.txt'
                            distribution 'repo'
                        }
                    }

                    developers {
                        developer {
                            id 'evant'
                            name 'Evan Tatarka'
                        }
                    }
                }
            }
        }
    }

    def grgit = Grgit.open(project.projectDir)

    task checkRelease << {
        if (version.endsWith('SNAPSHOT')) {
            throw new ProjectConfigurationException("Version: $version must not end in SNAPSHOT", null)
        }
        
        def readmeVersion = file('README.md').readLines().find { it.contains('me.tatarka:gradle-retrolambda:') }?.trim()
        
        if (readmeVersion == null) {
            throw new ProjectConfigurationException("Missing README version string", null)
        }

        if (!readmeVersion.contains(":$version")) {
            throw new ProjectConfigurationException("README version string: $readmeVersion must match release version: $version", null)
        }
        
        def changelogVersion = file('CHANGELOG.md').readLines().find { it.contains("### $version") }
        if (changelogVersion == null) {
            throw new ProjectConfigurationException("CHANGELOG does not contain changes for release version: $version", null)
        }

        def branchName = grgit.branch.current.name
        if (branchName != 'master') {
            throw new ProjectConfigurationException("Branch: $branchName must be master", null)
        }
    }

    task tagRelease(dependsOn: [checkRelease]) << {
        grgit.tag.add {
            name = "v$version"
            message = "Release of $version"
        }
    }
    
    uploadArchives.dependsOn(tagRelease)
}